#include <iostream>
#include <vector>

using namespace std;

int main()
{
    vector<int> v;
    v.push_back(1);
    v.push_back(2);
    v.push_back(3);
    v.push_back(4);

    for(int i=0;i<v.size();++i)
    {
        cout<<v[i]<<' ';
    }
    cout<<endl;
    return 0;
}
